There are so many 44 magnums out there and so few M24 44 specials.
Why take one more M24 out of circulation?
Worse yet, why spend money to do this?
Why not just sell the M24 or trade it for what you want?

If you find a buyer who wants a nice 44 Special (and there's lots of such guys) you'll probably be able to sell the M24 for more than the cost of the gun you want.

Sorry for being blunt, it's not anything personal, but it seems ridiculous to even consider this sort of conversion.

Jim